package thread;


import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/**
 * 线程池
 * 线程池是线程的管理机制,主要解决两个问题
 * 1  重复使用线程
 * 2  控制线程数量
 */
public class ThreadPoolDemo {
    public static void main(String[] args) {
        ExecutorService threadPool =
                Executors.newFixedThreadPool(9);

        //指派任务
        for (int i = 0; i < 5; i++) {
            Runnable r = new Runnable() {
                @Override
                public void run() {
                    Thread t = Thread.currentThread();
                    System.out.println(t.getName()+"恭喜你发财");
                    try {
                        Thread.sleep(5000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    System.out.println(t.getName()+"恭喜你精彩");
                }
            };
            threadPool.execute(r);
            System.out.println("将任务交给了线程池");

        }

        threadPool.shutdownNow();
        System.out.println("线程池关闭了");
    }

}

